either had a respiratory illness or a family member with a respiratory illness living in their household. This was determined through a question asking if a responder, or anyone in their home, had been diagnosed with a respiratory illness such as asthma. Results indicate that respondents with a respiratory illness themselves or in the home, compared to those who did not, were 14% more likely to be aware of the IMECA index. Respondents with a respiratory illness in the home were more likely to have had a healthcare provider discuss the Air quality index with them. Following the assessment of air quality index awareness, analyses considered whether those who knew of this resource modified their behavior to reduce exposure to air pollution. To gauge this application of IMECA knowledge among respondents, the number of days modified, defined as avoiding exercise or strenuous activity outdoors in response to poor air quality over a 12-month period, was assessed. Perceived air pollution behavior modification was further separated by air quality index awareness status. It was found that 23.8% of respondents modified their behavior based on perceived poor air quality and were familiar with the index, and only 11.2% of respondents modified their behavior and were unfamiliar with this tool. Finally, 26.2% of respondents modified their behavior in response to an air quality report at least once over the course of 1 year. Plan of action In efforts to reduce the pollution, in 1989 the Mexican Government introduced "No-Drive Days", or Hoy No Circula, which prohibited drivers using their vehicles on one weekday per week, and in 2008 this was changed to include Saturdays. There is also large promotions for alternatives for driving, such as bus rapid transit lines and bike-sharing systems. To address the city's disastrous pollution levels, the city's administration and the Metropolitan Environmental Commission (MEC) have mutually implemented two successive programs: the Comprehensive Programme Against Air Pollution (PICCA), which was launched in 1990, and ProAire, launched in 1995. The purpose of each was to improve the air quality of the metropolitan area of the valle de México (the Metropolitan Area of Mexico City). ProAire is now into ProAire IV, which addresses eight themes: Reduction of energy consumption The first strategy has the purpose of creating a permanent program of ecosystem analysis of Mexico City, as well as the creation of urban sub-centers in the basins of those Metro stations that currently